John R. (University of California, Irvine, USA) Hipp & Sandra (Michigan State University, USA) Marquart-Pyatt 
Nonrecursive Models : Endogeneity, Reciprocal Relationships, and Feedback Loops [PDF ebook] 
Endogeneity, Reciprocal Relationships, and Feedback Loops

Nonrecursive Models is a clear and concise introduction to the estimation and assessment of nonrecursive simultaneous equation models. This unique monograph gives practical advice on the specification and identification of simultaneous equation models, how to assess the quality of the estimates, and how to correctly interpret results.